Livery yard problems, what should I do?

Ive been at this yard for about 4 years. When I moved there the old man ran it and there were no rules, just do what you want kinda thing, everything was great! Now his daughter in law (who married his son purely for the yard) Is running it and its gone so down hill! We arent allowed to do anything, there are loads of stupid rules and I get shouted at on a daily basis. I work on a racing yard so I'm not some inexperienced kid.

A few months ago I jumped a pony for my friend at the yard, she decided what he jumped and how high, we jumped upto 105cm but the second time we went to jump it he ran out, bucked and I fell off (it was an impressive buck!) Anyways the yard owner saw the video and had a massive go at me for jumping the "poor" pony too high, I asked her what it had to do with her what Emma does with her pony and bam, first warning to be kicked off the yard. I didn't even say it in a horrible way, just curious why she was angry about me jumping someone else's horse? She should have spoken to the horses owner, not me who was simply doing her a favour.

Last night I filled a net for my horse for this morning as i knew id be rushing and left it at the side as usual. I went up this morning and my net had gone, so i looked for it and found it in one of her horses stables, I went up to her and said I had filled a net last night as id be rushing now and it was in her horses stables and she went mad saying its stupid to fill nets and she will ban it and ive ruined it for everyone and that I should make time to do it when i need the net. I said i didnt understand what was so bad about filling nets and everyone does it.. bam second warning.

I just dont understand this, I get shouted at for jumping someone else's pony that they asked me to and now for someone taking my net?

By the way the pony I was jumping loves jumping and jumps 90cm with scope, he is forward into jumps and i didnt kick or carry a stick, heres the video of him jumping 90cm and you can see why we put it up another hole..

http://www.youtube.com/watch?v=BVfYBIBWnvk

And this is a vid of him jumping the one before i fell off, im hardly beating him to jump it

http://www.youtube.com/watch?v=f_YULlM2oyY

So what should, or can I do? Im not happy here anymore but I was there before her and don'y know if id find somewhere else. Help? :(